Forces in Equilibrium

Presentation

•

Science

•

9th Grade

•

Hard

•

NGSS

MS-PS2-2, MS-PS2-5, MS-PS3-2

Standards-aligned

Jamie Meaney

Used 7+ times

FREE Resource

7 Slides • 22 Questions

Forces in Equilibrium

Review Wednesday

April 27th, 2022

Zoom Expectations

Microphones Muted & Cameras ON
Active Participation in class
Unmuting to answer
Typing in chat (private or public message)
Submitting Assignments
Taking advantage of Office Hours

Open Ended

What artificial candy flavor best fits your personality and why?

Type response here

We've covered 5 lessons so far...

Let's Review 🌞

The following slides will contain various questions to see how we are doing with our Forces in Equilibrium Unit.

The questions could be multiple choice, fill-in-the-blank, or drawing.

The end will be a poll where you will evaluate how you are feeling about the concepts covered.

The Force Vector:

Lesson 1

Fill in the Blanks

Type answer...

Multiple Choice

Which statement describes a vector?

It has magnitude but NO direction

It has direction but NO magnitude

It has both direction and magnitude

It has constant magnitude but no direction

Multiple Choice

What is the unit used for force?

Kilograms

Newtons

Meters

Kilometers

Multiple Choice

The expression of a person's age as 15 years is an example of a(n) _____ quantity.

component

vector

resultant

scalar

Fill in the Blanks

Type answer...

Free-Body Diagrams

Lesson 2

Multiple Choice

Name the missing force...

weight force

normal force

frictional force

tension force

Multiple Choice

Name the missing force...

applied force

weight force

lift force

normal force

Draw

Add the forces needed to complete the free body diagram (HINT 4 FORCES)

Multiple Choice

The force that keeps objects on top of surfaces instead of letting them "sink" into the surface is known as....

static

abnormal

normal

inertia

Spring Force

Lesson 3

Multiple Choice

When you stretch a rubber band, you are storing __________ energy.

kinetic

potential

none of the above

all of the above

Multiple Choice

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

F=k/x

x=Fk

k=Fx

F=kx

Multiple Choice

A force of F=500 N is applied to extend a spring. What is the displacement x of the spring if its spring constant is k= 540 N/m?

0.96 m

0.93 M

1.3 m

1.1 m

Multiple Choice

A spring has a spring constant of 330 N/m. How far is the spring compressed if 150 N of force are used?

2.2 m

0.0014 m

5.0 m

0.45 m

Multiple Choice

The mathematical relationship between Force on a Spring and its change in length is...

direct proportionality

inverse proportionality

an exponential

no correlation

Friction

Lesson 4

Multiple Choice

What type of friction is not moving?

static

sliding

fluid

rolling

Multiple Choice

Friction is a force that acts in an ___________ direction of movement.

similar

opposite

parallel

west

Multiple Choice

How does friction affect speed?

more friction decreases speed

more friction increases speed

less friction decreases speed

Multiple Choice

Which of the following is an example of friction that is helpful?

Brakes used on a bike

Tires from a car on the road

Tread on the bottom of your shoes

All are examples that are helpful

Multiple Choice

How can friction be reduced?

reduce the force acting between the 2 surfaces

reduce the roughness of the 2 surfaces coming in contact

use wax, grease or oil

all of the above are ways of reducing friction

Multiple Choice

What type of Friction is displayed with a bowling ball?

sliding

rolling

static

There is no friction

Poll

How are you feeling about our Forces in Equilibrium Unit?

Forces in Equilibrium

Review Wednesday

April 27th, 2022

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